HB-adMSCs for the Treatment of Crohn's Disease

Primary Objective:

\- To investigate the efficacy of intravenous infusions of allogeneic HB-adMSCs vs placebo in patients with Crohn's Disease as determined by improvements in Crohn's Disease Activity Index (CDAI) scores. (Time Frame: Week 0 to Week 52). Minimal clinically important difference (MCID) for CDAI is defined as a decrease of ≥100 points.

Secondary Objectives:

* To assess the safety of intravenous infusions of allogeneic HB-adMSCs vs placebo in patients with Crohn's Disease as determined by the incidence of adverse events or serious adverse events. (Time Frame: Week 0 to Week 52). * To evaluate the efficacy of intravenous infusions of allogeneic HB-adMSCs vs placebo in patients with Crohn's Disease as determined by improvements in fecal calprotectin (FC) values. (Time Frame: Week 0 to Week 52). Clinically significant changes in fecal calprotectin (FC) values are defined as a ≥50% reduction in fecal calprotectin concentration from baseline, or a decrease to \<250 µg/g, whichever is achieved first.

Exploratory Objectives:

* To evaluate the efficacy of intravenous infusions of allogeneic HB-adMSCs vs placebo in patients with Crohn's Disease as determined by improvements in CRP values. (Time Frame: Week 0 to Week 52). * To evaluate the efficacy of intravenous infusions of allogeneic HB-adMSCs vs placebo in patients with Crohn's Disease as determined by improvements in ESR values. (Time Frame: Week 0 to Week 52).